I am starting my windrider 737 build soon, I plan on posting a lot of my build, to get input, and if so, help anyone else out there. I plan on converting a Boeing 737-700 to a 900ER. With my hands, and lots of help im sure, I plan to insert 2 plugs to lengthen the air frame (foam frame in this case). With one forward, and one aft of the wings. So... here we go...